control camera sensitivity
Rotating the camera:


press R to rotate at normal speed
press R and hold Shift to decrease the rotation speed
press R and hold Ctrl to rotate by 5 increments
press R and hold Shift+Ctrl to rotate by 1 increment




Panning and zooming the camera:

Enter the camera Fly Mode (Shift+F) and press:


E/Q to pan up/down
A/D to pan left/right
W/S to zoom in/out
hold Shift/Alt while panning or zooming to increase/decrease the camera speed (or do it using the Mouse Wheel)




These are the most common fly mode shortcuts. For more options take a look at the bottom strip after entering the fly mode.